Re:Arduino TRE
by reidrac on Saturday April 04, 2015 @05:43AM
(#9320466)
"both 5V and 3.3V logic, meaning you can use pretty much any part without level shifters"
Are you sure about that? It can provide different voltages in different pins, but the ATmega32u4 will work with 5v logic (if it is like the Leonardo, at 16MHz will be 5v), so you're in the same situation really and you won't be able to use a lot of 3.3v logic ICs without a translator.
I can be wrong though and this one operates in a different way, but doubt it.
EDIT: ignore me, the page says it has 3.3v logic pins.
EDIT 2: right! they're provided by the Sitara processor and not the AVR, so I wasn't 100% wrong after all ;)
Are you sure about that? It can provide different voltages in different pins, but the ATmega32u4 will work with 5v logic (if it is like the Leonardo, at 16MHz will be 5v), so you're in the same situation really and you won't be able to use a lot of 3.3v logic ICs without a translator.
I can be wrong though and this one operates in a different way, but doubt it.
EDIT: ignore me, the page says it has 3.3v logic pins.
EDIT 2: right! they're provided by the Sitara processor and not the AVR, so I wasn't 100% wrong after all ;)
See: https://github.com/CICCIOSGAMINO/arduino_TRE